Saw-filing machine



(No Model.)

2 Shets-Sheet 1 G. R. HUPP & G..H. VERNON.

SAW FILING MACHINE.

Patented Jan. 28, 1896.

AN DREW B.GRAHAM. PNOYOUTHQWASNIN I10.

(No Model.) 7 2 Sheets-Sheet 2.

G. R. HUFF & G. H. VERNON. SAW FILING MACHINE.

N0. 553,5? 1. a Jan. 28, 1896.

. mlggg k mmm. I I Y) UNTTED STATES PATENT OEETEE.

GEORGE R. lIUFF AND GEORGE H. VERNON, OF ST. PAUL, MINNESOTA.

SAW-FILING MACHINE.

SEECIFICATION forming part of Letters Patent No. 553,584, dated January28, 1896. Application filed April 23,1894. Serial No. 508,744. (Nomodel.)

To Cl/ZZ whom it may concern.-

Be it known that we, GEORGE R. HU FF and GEORGE H. VERNON, citizens ofthe United States, residing at St. Paul, in the county of Ramsey andState of Minnesota, have invented certain new and useful Improvements inSaw-Filing Machines, of which the following is a specification.

This invention relates to saw-filing machines; and it consists in theconstruction, combination and arrangement of parts, as hereinafter shownand described, and specifieally pointed out in the claims.

In the drawings, Figure 1 is a side elevation, Fig. 2 is a plan View,and Fig. 3 is a cross-sectional elevation, of the apparatus. Fig. 4: isa sectional elevation of the mechanism whereby the saw is adjusted inthe clamps, and Fig. 5 is a cross-sectional view of the same. Figs. 6and 7 are perspective views of the two main portions of thesaw-adjusting mechanism detached. Fig. 8 is a bottom plan view, Fig. 9is a sectional side elevation, Fig. 10 is a cross-sectional View, andFig. 11 is an end elevation, of the file-holder detached. Fig. 12 is aperspective view of the main sliding frame detached. Figs. l3, 14, 15,and 16 are perspective views of the different parts comprising thegaging mechanism detached. Fig. 17 is a perspective view of a section ofone of the clamp-bars, showing one of the swiveled stops for the upperor tooth edge of the saw. Fig. 18 is a perspective view of a section ofone of the clamp-bars, illustrating the construction of the plate forregulating the position of the gage with relation to the first toothwhen commencing the filing action. Fig. 19 is a perspective view of thegage-plate and its slide detached.

This apparatus comprises two clamp-bars between which the saw is held bya vise or other suitable means, a frame sliding along the upper edge ofthe clamp-bars, a holderframe or guide for a file-holder and swiveledupon the sliding frame, and a file-holder fitting into this guide orholder-frame, the swiveling of the holder-frame permitting the teeth ofthe saw to be filed at any desired angle.

A A represent the clamp-bars between which the saw-blade B is adapted tobe held, the clamp-bars to be held in a vise of any suitableconstruction. Arranged to slide along I over these clamp-bars by ways ais a frame consisting of side bars D D connected at their ends bycross-bars- D D the latter arched upward to enable them to pass over thesaw-teeth and provided with segments D D. These segments are formed withgrooves or channels 1) to receive ribs onafile-holder frame E E thesegments permitting the fileholder frame to be oscillated over theclampbars, and the ribs and channels preventing its removal exceptwhenturned around sub stantially parallel with the clamp-bars, a posit-ionit would never assume when in use. The file-holder frame will nottherefore be liable to jump from the sliding frame.

The file-holder frame consists of two main side plates, formed to standat an angle to the clampbars, as shown, and adaptedto be held in fixedrelations to the segments by small lever-catches d, fitting by theirlower legs into notches d in the inner faces of the segments, thenotches being so placed as to enable. the file-holder frame to beadjusted to suit the different angles of the teeth of the differentgrades of saws. The arched crossbar D is formed with an extension D intowhich a standard F is pivoted, and adapted to receive a screw-rod Fwhich is tapped through it, as shown.

F is a fiat spring-plate supported in a slot 6 around the pin of thestandard F, and with one end turned upward and notched at c and fittinginto a channel in the head of the screw-rod F as shown. By thisarrangement the revolution of the screw-rod will cause the spring-plateto be adjusted lengthwise of the clamp-bars.

Pivoted at g to the arched cross-bar D is a lever I-l lying normally ina diagonal position across the spring-plate F and provided with acam-rib extending downward from its free end, as shown more clearly inFig. 14, which represents a perspective view of this lever detached. Thelever H is provided with a small projection extending down alongside therear edge of the springplate F to limit the movement of the lever in onedirection, while another small projection, on the end of the cam-ribserves to limit the movement of the lever in the opposite direction. Athumb-plate is formed upon the lever to assistin its operation. The

free end of the spring-plate F is bent downward, and is formed with anotch h and leg 7L2, the notch adapted to fit down into the spacebetween the teeth of the saw, and the longer leg adapted to act as astop to prevent the spring-plate being turned entirely across the saw.The springplate is thus free to be turned off to one side, as shownbydotted lines at i in Fig. 2, when the segmental frame is to be movedalong the clamp-bars, and then when the required position is reached thespring-plate is turned inward until the notch h fits into the bottom ofone of the teeth, f, of the saw, the leg 7L2 arresting the motion of thespring-plate beyond its proper position parallel with the clamp-bars.Then the further inward movement of the lever H causes the cam-rib g torun upon top of the spring-plate and force it downward upon thesaw-blade,and thus hold it with suffi cientfirmness to lock the slidingframe in position upon the clamp-bars, the lug g preventing the leverfrom being moved entirely across the spring-plate, as before described.The spring-plate will be loose enough around its pivotal point on thestud of the standard F to move freely when the cam-rib is off from it,as shown in Fig. 1, and this freedom of motion will permit the cam-ribto move the notched end of the spring-plate laterally toward thesaw-blade without riding it or pressingit downward, but as soon as theleg 7&2 comes in contact with the side of the sawblade, and the furthermotion of the springplate checked, the continued lateral motion of thelever will cause the cam-rib to ride the spring-plate and lock the wholesliding frame fast to the saw-blade.

The lever H extends backward beyond its pivotal point, as shown, so asto afford a support to the shorter end of the lever, so that the strainsupon the rivet g will be lessened.

Attached to the side of the standard F is a slotted plate a with oneend, 71 turned inward over the upper surface of the springplate F andmade adjustable upon the standard, as shown, to form a gage by which thedevice may be adapted to saws of different sizes of teeth, ashereinafter described.

The spring-plate will be provided with gagelines corresponding to theteeth of different grades of saws, by which the gage-plate may be set,as hereinafter described.

Attached to one of the side bars D of the sliding frame is a plate thaving gage-lines upon its upper surface corresponding to the pitch orhook of the teeth of the various grades of saws, and extending inwai dto a point sufficiently near the saw to enable one of its gage-lines tobe placed in line with the bottom of one of the spaces between a pair ofthe teeth.

The bottoms of the spaces between the teeth of saws are so nearlyuniform that they are the best portion of the saw to employ as a guidein filing the teeth, and this apparatus is arranged to be so used, thenotch h in the end of the spring-plate, as before described, beingintended to fit down into the bottom of one of the spaces between theteeth. At suitable points on one of the clamp-bars, preferably near theends, are two small catches 0', (one only being shown,) pivoted by theirlower ends, as shown in Fig. 17, and with the upper end turned off toone side, as shown at 0- These turned-off portions are adapted to fitinto the spaces between two of the saw-teeth, and form stops or guidesto indicate the proper position of the saw when it is first placed inthe clamp.

Attached to the same clampbar as the catches 0", preferably near theends or in proximity to the notches, are two screw-rods M, (only onebeing shown,) projecting below the clamp-bars and exceeding in lengththe widest saw-blade which will be liable to be filed. Fitting upon eachof these screw-rods is a win g-nut M with an upwardly-pro j ectin g hubM over which a sleeve M fits loosely, the sleeves each having a grooveor slit 0 adapted to fit over the back edge a of the saw, as shown inFigs. 1 and hen the saw is to be placed in position, the clamp-bars areseparated, the catches 7" turned upward, as in Fig. 17 and the sawplaced with the turnedover ends r in the spaces between two of itsteeth. The sleeves M are then pushed up against the back edge of thesaw-blade with the slits c embracing the edge, and the wingnuts Mscrewed up, pressing the saw-blade against the catches r with suflieientfirmness to support it in place until the other clampbar is placed inposition, and the two clampbars with the blade between them compressedin the vise. The catches r are then pressed to one side and turned downout of the way into their recesses 0- as shown in Figs. 1 and 2, thecatches being only for temporary use to support the saw-blade whilebeing placed in the clamps and set in position in the vise.

The file-holder consists of an open frame K with handle K and fittingclosely between the guides E E and with side ribs to limit its downwardmovement and form guide-stops to secure the uniform action of the file.Depending from the end of the frame K next to the handle K is a lug 772'into which the end m of the file K is pivoted, while the other end m issupported in a stud m journaled in a lug m depending from the outer endof the frame K, as shown. The file end m is made triangular, or of anyother irregular shape, and fits into a correspondingly-shaped cavity inthe stud on, so that when the stud is oscillated, the tile will beoscillated with it to change its pitch. Attached to or formed in onepiece with the stud m is a lever or arm on extending upward across theoutside of the end of the holder-frame, and adapted to be fixed in itsposition by a set-screw m', the latter tapped into the holder-frame andfitting through a curved slot m in the lever m, so that the levermay bemoved laterally from side to side and thus oscillate the file byoscillating the lug which supports it. The limit of the throw of thelever m permitted by the length of the slot hi will correspond to theutmost extent of the pitch of the teeth of any grade of saw which is tobe filed, and by setting the lever at the intermediate points, anyrequired pitch may be obtained. In order to secure uniformity of thepitch a series of holes m are formed in the end of the holderframe intowhich a pin m in the lever m fits, the holes corresponding to thepitches of the teeth of the different grades of saws.

As before stated, the guides E E of the swiveled file-holder frame areformed with an upwardly-trending angle, so that the file in its cuttingaction will act upon the saw-teeth at an upward angle,th is motioninsuring much better results and preventing the formation of burs uponthe cutting-edges of the teeth, thus bringing the points of the teeth toa fine point, and not being so liable to cause the sawblade to vibrate.

After the sliding frame is properly set, as above noted, thespring-plate F is adjusted by the screw-rod F until its notch h, or thebent end in which the notch is formed, will fit down into the space twoteeth distant from the tooth which is to be filed, toward the heel endof the saw, and locked therein by the cam-lever H. The pitch of the fileis then properly set by the lever m to correspond to the pitch of theteeth of the saw or to the pitch which it is designed to give the teeth.The file-holder is'then inserted and the tooth above which thefile-holder comes is filed. Then when that tooth has been filed thefileholder will be removed, the spring-plate released, and the slidingframe moved along and the spring-plate locked with its notch in thetooth-just filed, which will bring the file, when the file-holder isreplaced, in position to file the second tooth therefrom, and so on,filing every other tooth throughout the length of the saw, the filedteeth being thereafter the guides or standards for insuring theintegrity of the filing.

By insuring the proper position of the bottoms of the spaces above notedin starting the filing, the bottoms of all other spaces will necessarilybe brought to a uniform distance apart, and if this uniformity ismaintained, the cutting-edge and points of the teeth will becorrespondingly uniform.

XVhen the teeth have all been filed in one direction, the clamp-barswith the saw inclosed by them is reversed in the vise, and the swiveledfile-holder frame reversed in position upon the clamp-bars, and theunfiled teeth filed as the sliding frame travels again over theclamp-bars from heel to point, the spring-plate F being adjusted thedistance of one tooth and set into the space of the first tooth formerlyfiled, the filed teeth being used as guides in the return motion, toinsure uniformity.

In fine saws the first tooth filed may be at a greater distance than twoteeth away from the space in which the spring-plate is locked, to avoiddanger of the cutting of the springplate by the file, but the actionwould be substantially the same.

The gage-lines on the plate 15 and the holes m in the end of thefile-holder will correspond, and will be numbered to correspond, so thatthe file will be adjusted to the proper pitch.

Attached to one of the side bars D is a plate T with its inner edge inclose proximity to the side of the saw in the clamps and adapted toreceive the filings and carry them off to one side over the edge of theclampbars and other parts, so that they do not come in contact with anyof the Working parts of p the instrument.

By preventing the filings from coming in contact with the working partsall danger of wear and undue friction from that source is avoided, andthe working parts may be lubricated without danger of the commingled oiland filings cutting out the working parts.

The saw-blade should be set down between the clamp-blades as far aspossible, so that the chance for vibration is lessened, and in orderthat the inclined operating file-holder may be operated upon the teeththus set the upper surfaces of the clamp-bars are chamfered off, asshown in Fig. 3, so that the file will not cut them.

Having thus described our invention, what we claim as new is- 1. In asaw filing machine, clamps between which the saw is adapted to be held,aframe slidable along said clamps, and provided with segmental wings, afile holder frame swiveled upon said wings and adapted to serve as aguide for afile holder, a spring plate pivotally connected to saidslidable frame and with its free end adapted to fit the spaces betweenthe teeth of the saw, and a lever havinga cam rib connected to andadapted to guide said spring plate, and compress said spring plate andlock it in position, substantially as and for the purpose set forth.

2. In a saw filing machine, clamps between which the saw is adapted tobe held, a frame slidable along said clamps, and provided with segmentalwings, a file holder frame swiveled upon said wings and adapted to serveas a guide for a file holder, a spring plate pivotally connected to saidslidable frame and with its free end adapted to fit one of the spacesbetween the teeth of a saw, a lever having a cam rib connected to andadapted to compress said spring plate and lock it in position, and anadjusting screw adapted to adjust said spring plate in relation to saidslidable frame and the sizes of the teeth to be filed, substantially asand for the purpose set forth.

3. In a saw filing machine, clamps between which the saw is adapted tobe held, a frame slidable along said clamps and adapted to support thefile holder, a gage plate projecting from said slidable frame andgraduated to correspond to the required pitch of the teeth of the saw, aspring plate pivoted to said slidable frame and with its free endadapted to fit one of the spaces between the teeth of the saw, and aswiveled lever having a cam rib and adapted to compress said springplate and lock it in position, substantially as and for the purpose setforth.

4. In a saw filing machine, two clamp bars between which the saw isadapted to be held, guide catches for the teeth pivoted in one of theclamp bars and adapted to be folded down into recesses therein when notin use, rods depending from said clamps and having sleeves adapted toinclasp the lower edge of the saw blade, and adjustable upon said rods,substantially as and for the purpose set forth.

5. In a saw filing machine, clamp bars between which the saw is adaptedto be held, a frame slidable along said clamp bars and adapted tosupport the file holder and having a gage plate projecting from saidslidable frame and graduated to correspond to the required pitch of theteeth of the saw, and a springplate adj ustably connected to saidslidable frame and adapted to be locked into the spaces between theteeth of the saw, substantially as and for the purpose set forth.

6. In a saw filing machine, clamps between which the saw is adapted tobe held, a frame slidable along said clamps and provided with segmentalWin gs, a file holder frame swiveled upon said wings and provided withparallel guides, a file holder supported by said guides and having adepending lug on one end in which one end of the file is centered andwith a socket depending from the other end, an arm having a stud fittingsaid socket, and in which the other end of said file is centered andheld from turning therein, and means for adjusting said arm to changethe pitch of the file, substantially as and for the purpose set forth.

In testimony whereof we have hereunto set our hands in the presence oftwo subscribing witnesses.

GEORGE R. IIUFF. GEORGE II. VERNON. \Vitnesses:

(J. N. \VooDWAnn, II. A. CAMPBELL.

